Daily demand for round-trip airline tickets from Timmins to Toronto can be represented by the function Q_D =150 - 0.1P and the supply of airline tickets can be represented by the function Q_S= 0.1P - 50 where Q_D is the quantity demanded, Qs is the quantity supplied and P is the price of an airplane ticket.

2-a. Find both the inverse demand and inverse supply functions.

2-b. Determine the equilibrium price and quantity.